As far as I remember when I looked at these oil-from-algae schemes quite some years back, contamination from other algal species, many better matched to the growing environment and much faster and more virolent is a fairly significal problem unless you seal the entire growing pond up tight...
Of course this closed system leads to massive cost blow-outs...
DOesnt mean it wont work one day, but like many of these schemes have quite a lot of very difficult problems to find a cost effective and practical solution to...
